Region
United States
239
California
13
Idaho
13
Southern States
9
Northeastern States
8
Oregon
8
Atlantic Coast (U.S.)
6
Montana
6
Africa
4
Alabama
4
Klamath River (Or. and Calif.)
4
Klamath River Watershed (Or. and Calif.)
4
North America
4
Northwest, Pacific
4
Puerto Rico
4
Alaska
3
Atlantic Ocean
3
Central America
3
Florida
3
Georgia
3
Maine, Gulf of
3
North Atlantic Ocean
3
Northwestern States
3
Utah
3
Washington (State)
3
Wyoming
3
Bering Sea
2
Caribbean Sea
2
Colorado
2
Long Island Sound (N.Y. and Conn.)
2
Mississippi
2
Nevada
2
New York Bight (N.J. and N.Y.)
2
North Pacific Ocean
2
Pacific Coast (U.S.)
2
Rocky Mountains Region
2
Scott River Watershed
2
Shasta River
2
Tongass National Forest
2
Tongass National Forest (Alaska)
2
Uinta Mountains (Utah and Wyo.)
2
Yellowstone National Park Region
2
Africa, East
1
Antarctica
1
Appalachian Region
1
Arizona
1
Arkansas
1
Bahamas
1
Beaufort Sea
1
Belize
1
more ...